Rekensommen met erbij en eraf tot 100
In de mix
1.
50
10
+
=
2.
100
50
–
=
3.
60
40
–
=
4.
10
10
+
=
5.
80
40
–
=
6.
70
10
+
=
7.
60
10
+
=
8.
40
20
+
=
9.
40
20
+
=
10.
50
30
–
=
11.
50
30
+
=
12.
50
40
–
=
13.
60
40
–
=
14.
70
20
+
=
15.
50
50
+
=
16.
20
10
+
=
17.
20
20
+
=
18.
20
20
+
=
19.
50
40
+
=
20.
20
0
+
=
21.
30
30
+
=
22.
40
30
–
=
23.
50
30
–
=
24.
30
20
–
=